Question

multiple choice question
what is the effect of a neuromodulator?
-
o it stimulates the production of neurotransmitter molecules.
o it alters the response of the neuron to a neurotransmitter.
o it triggers the opening of voltage - gated ion channels.
o it stimulates regeneration of a damaged axon.

Explanation:

Neurotransmitters directly transmit signals, while neuromodulators modify (alter) a neuron's response to neurotransmitters. They don't directly trigger ion - channel opening (that's often a neurotransmitter or a direct stimulus effect), don't mainly stimulate neurotransmitter production (though they can have some influence in a broader regulatory sense), and are not primarily for axon regeneration.

Answer:

It alters the response of the neuron to a neurotransmitter.